Dental spoon



May 1930.

A. HARD-ER DENTAL SPOON Filed- March 23, 1928 er /Nv/vrac:

,PatentedY May 2o,` 1930y /UNITED lsTATi-:s PATENT i OIFFIICB]y ARTHUR HAYRDER, OF WARNEM'UNDE, GERMANY DENTALy spoon n Appncation inea Maren y23, 1928, serial NQ.2e4,161, amiin Germanjnprii 1c, 1927. A i

My invention relates to a' dental spoon for taking casts, impressions or prints of the up per jaw in which the material for taking the impression displacedy by the penetration of the teeth Vis prevented from passing into Vthe throat of the patient,` by being collected in a special chamber and discharged from the mouth of the patient.

The spoons for taking casts ordinarily yeml ployed in the art of dentistry are open at the back or lightly arched and permit the 'material or compound used for taking thecast and displaced by the penetration of the teeth of the upper jaw to pass freely out at the back.

If a cast of the upper jaw is taken while'the patient occupies a recumbent position the exl cess material is liable to penetrate into the l throat of the patient and to causel irritations.

ggf dental spoons, a main spoon adapted toseal l To overcome this drawback vof the existing the throat has been enclosed from underneath by a second auxiliary spoon, a chamber being formed between the'two spoons.

My invention consists substantially in providing an intermediatemember or connection between the two spoons which does not rigidly x the mutual position of the spoons, but

permits a raising, lowering or lateral displacement of the lower spoon in relation to the upper. Preferably leasily exchangeable linspection windows are provided in the bot-V tom of the lower spoon carrying the intermediate member. lAn* extension of the spoon supporting' the intermediate `member is formed as discharge gutter and collecting receptacle for the excess compound.

, An embodiment of myinvention is illustrated in the accompanying drawing by way of example. In the drawing is:

Fig. l, a longitudinal section,

Fig. 2, a plan, l l y o Y Fig. 3, a cross-section through my im- A proved dental spoon,

Fig. 4, a cross-section through the discharge gutter,

Fig. 5, an inverted plan, and

Fig. 6 is an enlarged elevational detail view of the universal connecting means between the spoons.

Like parts are indicated by likeV letters of spoons, larger quantitiesk are able to escapek through the front gutter d to the end of the "gutter formedas receptacle e.V AThe lgutterUZ land-(the receptacle e form part of the lower` 5 figures ,ofV the Y drawing it win? be Sees,

spoon inl contrast `with the known Yoler'it'al Spoons, with a separatecavity forv the reception of the displaced material for taking' the cast. ff

The novel connectionor combi-nation of the twoV spoons according to lmy invention perfmitsia slight/changek ofthe position ofthe lowenspoon in relation to the upper during th'e'pro'cess of taking the impression or cast. For thispurpose a joint f is provided lbe- 'tween'the two spoons, which permits the rear end of the lower spoon to be raisedfor low- `ered in order tofattain aparticularly eective .sealtowards' the rear by forcing the rear iend `ofthe lspoon Z2 gently against the roof vof the l,

mouth of the patient, while the upper lspoon retains its iirmhold within the teeth in' the upper jaw.,y The capacity' of the spaceorV compartmentbetween the two spoons may lthus also be varied by changing the mutual positionof the spoons according to the'quan tity of Vthe impression lmaterial .to be dis'- charged. f Thestrip g of rubber, guttapercha, caoutchouc orv thelike is intendedy to reduce the irritation when the rear endV of the spoon Y) is pressed against the roof ofthe'mouth and to 'assist in producing a good seal. Guttapercha strips as used for V closing illed'teeth may 'preferably be employed for these-packing stripsg, which are then heated andpressedY down uponthe edge of the lower spoon. They may easily be removed after having been 1 used once and be replaced by a fresh one. V

The easily exchangeable inspection windows h 'of cellon or a similar material provided in the bottom of the lower spoon b enable the process taking place inthe spoon to beV closely observed vand also whether the =required,the rear end of thespoonb'may be 'raised' withjmt` thelpatent altering his posi- -tion'in thedental chair. Y *Y :The connection or combination of'theupi per spoon a with tl'ie'-lowe'rspoonl b may be packing strip g'ts well and the impression material isproperly discharged, so that, if

effected by meansvof the joint or hinge f o r through the agency of a plate i which closely adapts fitslelfitol Vthe,lowershape of fthe;.,spoon a and is Piriits turn connected tothe upper A,spoon ain an easily detachable'lmanner,:for Y instance byf screws' c, which may easilyljbe .Y

Y removedY forcleaning andk Vvsterilizingg; the

Y,upper jaw, in combination, v a main .spoon c adapted to produce atight sealytowards the throat, a spaced lowerlspoon adaptedto en-V j close the saidmain spoon from below,iso that spoons.A

I Various fore,that onlyirsuch limitations shallbeplaced thereonz as are imposed by I claimas my invention :g

and laterally vtheref,l v.

2. Ina dental spoonQfortaliingcastsoflthe A l throat, a spaced lower `spoon adapted. toenvclose thef said main spoon frombelow, so .that

aspace is left between said twospoons, Aan intermediate member adaptedftfo connect said Y spoons lsothatthey lower universally mov:

ablein relationlto the upper, and easily de- Y tac'hable inspection windows in;thebotton1 of saidlower spoon'sup'porting Asaid 'intermeldiatefmember.

" a space *is left 'between said" two spoons, an

fYpression*materialdischargei gutter terminati-- .I v ingiin. acollectmg receptacle formingv aneX-V natixre.' f

intermediate member vadapted toi connect said .spoons `so that`.the lower. is universally movable in Yrelation'to, theup'per,r andv an im- .tensionof'saidlowers oon. Y VIn testimony wher-feo lhaye. axedmy sigmodifications andechanges may be l' made'without *departing from the spirit and Y n j the scope of the'invention, and1.desire`there Y thepriorart. f

akin @denial spam fdffmkihgagfs. of the Y ,spe'r jawyin. combination,l a n nfaix'i:spoony f apted to produceatight seal towards the mi l 

